Do you know the specs of the two systems? Prebuilts tend to have more than one configuration, and the CPU can be different. In order to know which is better for the intended usage, the specs would need to be known.
From what I came across through an internet search the Dell should be better, but I wouldn't take this as an affirmative answer.
Also be careful in upgrading the graphics card in such systems. Likelihood is you'd need a new PSU, and the motherboards may not be industry standard.
Main Circuit Board b
Board Dell Inc. 0J3C2F A00 Serial Number 8RDCKS1CN7360417M03JX Bus Clock 100 megahertz BIOS Dell Inc. A22 07032018
Memory Modules c,d 10122 Megabytes Usable Installed Memory
Slot 'ChannelA-DIMM0' is Empty
Slot 'ChannelA-DIMM1' has 4096 MB (serial number 3A7C5021)
Slot 'ChannelB-DIMM0' has 2048 MB
Slot 'ChannelB-DIMM1' has 4096 MB (serial number 3890E501)
Standard SATA AHCI Controller
Intel(R) HD Graphics [Display adapter] VIZ M320VT [Monitor] (31.5vis, April 2010)
Bus Adapters Microsoft Storage Spaces Controller Intel(R) 6 SeriesC200 Series Chipset Family USB Enhanced Host Controller - 1C26 Intel(R) 6 SeriesC200 Series Chipset Family USB Enhanced Host Controller - 1C2
Odd RAM configuration, I had 2 sticks of 4gb memory, someone gave me a stick of 2gb. I added
it and it shows up on system properties.
Looks like it has a 250 W power supply. I wasn't going spend to much $100-$150? Maybe should look into newer computer this one is 8 years old?
In some cases that RAM configuration might be more troublesome. As long as the system is fine and software isn't negatively affected.
Most modern graphics cards will require a higher wattage PSU. Depending what you plan to run the PC may be adequate, but yes it is a bit on the old side. However if it does what you want and you're happy with it, it's not an issue to worry about.