Probably not, since the size diff is so small.
Sharper? Actually, no. Only diff what there is, is that individual pixels are tiny bit smaller and that may give you a feel that it is "sharper". Still, it takes as little as ~10cm closer viewing distance, for the same level of "sharpness" of 22" as it would be with 23" monitor.
What actually makes image on monitor to look sharper is the contrast ratio.
For example, the following image;
Do you agree that image on the left is "sharper" than image on the right?
If so, then this is good example of different contrast ratio. Image on the left has around 3000:1 contrast ratio (e.g VA panel), while image on the right has 1000:1 contrast ratio (e.g TN and IPS panel).
Here's further reading of contrast ratio, if interested,
link:
https://www.cnet.com/culture/contrast-ratio-or-how-every-tv-manufacturer-lies-to-you/
LG is good brand, especially with TVs. It's one of the top brands, alongside Sony and Panasonic. And them being good with TVs, is good indicator that they are good with monitors too.
Dell has poor reputation, namely due to their proprietary hardware within their prebuilt PCs.
Between the two, i'd go with LG on a heartbeat.
Only affect that i can see, is that with internal power brick, the heat it produces, feeds into other components of the monitor. While with external power brick, the heat production doesn't interfere with monitor and it's internals.
Valid concern and yes. If the digital port (HDMI) happens to crap out, you can then use analog port (VGA). Dell monitor doesn't have that convenience.
A bit more about different panel types;
To pick a monitor, it's good when you know more about different monitor panel types. There are 3x kinds of monitor panels: TN, VA and IPS. Actually there are more (variations of the main three) but i focus on these main ones.
TN panel is oldest of the three and also cheapest. Where TN panel excels is it's performance, most notably response time (1ms).
Though, TN panel also has it's downsides. Prominent ones are: poor color accuracy (washed out colors), very narrow view angle and poor contrast ratio (max 1000:1).
Gaming wise, TN panel monitor is best suited for fast-paced games (FPS, racing etc), where you don't care as much about pretty colors as you do about smoothness of movements.
For everyday use, the poor contrast ratio, poor color accuracy and narrow viewing angles are the worst of the three panel types.
IPS panel has been around for some time and is also the most expensive of the three.
Where IPS panel excels is it's color accuracy, which is the best of the three. Also, it has widest viewing angles of the three.
But where IPS panel falls short is response time. IPS technology by design can't be any faster than 4ms (compared to the 1ms most TN panels are). Another area where IPS panel falls short is it's poor contrast ratio which is equal to a TN panel (max 1000:1), despite it's great color accuracy. This is most prominent when looking at black image and where black isn't black but instead gray or some form of blue. Refresh rates aren't IPS panel strong side either and many IPS panels are 60Hz, especially on higher resolutions. There are some 1440p 165Hz and 4K 120Hz IPS panel monitors out there but they are few and far apart, also costing a fortune.
Gaming wise, IPS panel monitor is best suited for slow-paced games (RPG, strategy etc), where you have time to see all those pretty colors and where smoothness of movements isn't that important.
For everyday use, it has best color accuracy (pretty colors) and very good viewing angles. But it has the same level of poor contrast ratio as TN panel have. Ruining the overall look.
VA panel is the newest of the three and price wise, it falls between TN and IPS. VA panel was created to take the best of both worlds (TN and IPS) and combine them.
Where VA panel excels is it's contrast ratio (min 3000:1), where you'd see the deepest and richest blacks. Also, it doesn't fall short on other aspects as well. VA panel color accuracy isn't as good as it is for IPS panel but it's close to the levels of IPS panel (considerably better than TN panel). It's viewing angle is also a notch smaller than that of an IPS panel but again, considerably better than that of a TN panel. Refresh rate wise, VA panel is more capable on different resolutions than IPS panel. Response time is another area where VA panel does good. While VA panel can't naturally be any faster than 4ms (just like IPS panel), it can achieve the magical 1ms response thanks to the software solution in it.
With VA panel monitors making waves lately, there aren't any major downsides of them. Availability used to be issue but not anymore.
Gaming wise, VA panel monitor is suited for all kinds of games. VA panel is like Jack of all trades but master of none.
And same goes for everyday use. All around good panel, which excels with contrast ratio.
So, if you care about image "sharpness", look towards VA panel monitors, with minimum of 3000:1 contrast ratio.
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