You have multiple threads, I'm starting to get confused over which one is which.
As long as you understand the differences between tech, you will probably be able to decide one way or the other for yourself. Monitor reviews are MASSIVELY subjective and it's rare that everyone is ever in agreement. Go to a store and take a look at some for yourself.
Fast enough for most games, commonly targetted at professionals and therefore frequently includes scalers that add input lag to the equation. Richest colours, true 8-bit (IPS and S-SIPS) panels also give smoother gradients, though many games do not utilise this well - gradient banding is still present because of texture compression or alpha-blending shortcuts. Viewing angles are good for spectators as well as yourself but IPS exhibits an off-angle glow outside a tight sweet spot, meaning that dark scenes aren't as detailed as you'd expect given how much praise gets heaped on IPS for colour accuracy.
Much greater range from bad to good, and there are many bad models out there. Most TN screens with scalers will usually have a game mode or low-lag mode since this is an obvious market. 120Hz is possible. Most 120Hz TN screens are fast enough to make texture detail stay sharp, whereas the fastest IPS screens still smear details slightly when scrolling. The early Benq's are the exception to this rule, check out TFTcentral.co.uk for more in-depth info. Colours can still be rich but accuracy is out, and can sometimes look artificially vivid. You are guarateed gradient banding because all TN screens are now only 6-bit (like e-IPS). Contrast ratios are usually much higher because the black levels are much lower. This means moodier and richer dark scenes but the effect of this can be ruined by noisy dithering on some models. Off angle viewing is awful, especially from below the ideal viewing position. The solution is to sit in front of your screen (I guess you were planning on doing that already, but it's worth mentioning).
is the PE better than FTW, significantly?
Subjectively, yes/no/maybe - it depends who you ask.
Should you care? No. If you spend too long thinking about it something better will get released anyway.