Unlike other hardware where capability is usually the primary consideration, cases are largely down to "can I stand to look at this day after day" and "will all my crap fit". If the answer to both of those is yes, then I'd say based on the reviews that both of them are pretty decent. I think there are better choices for the price that offer some features not found on either of those cougar cases such as somewhat more extensive pass through grommets and cable management features, both seem very heavy as well so moving them around or working in them might be less than convenient and neither of them comes with PWM fans, which I tend to prefer over DC controlled 3 pin fans.
Also, both only support CPU coolers up to 160mm, which means they are only 5mm wider than the case you have. If you think an extra 5mm is going to give you the additional clearance you need, then great, but that's less than a quarter of an inch so if not you might want to keep looking.