Hi mr_x_plosion, I can only give advice based on technologies and other guidance since I've not had chance to test these two personally as yet. The ocUK screen looks like it uses a VA panel from what has been said by Gibbo. This is likely to be pretty comparable in responsiveness to the rest of the 6ms G2G generation of VA panels, including models like the Dell 2407WFP (6ms G2G S-PVA) and BenQ FP241W. These panels are quite similar in terms of responsiveness in practice. Arguably they are slightly faster than the 5ms TN Film generation of panels, since the 5ms TN models do not use overdrive technology to boost grey to grey response times, like the VA panels do. However, when overdrive is applied to TN Film, it then improves things further, so an overdriven TN Film panel is commonly more responsive than an overdriven VA panel (general rule of thumb).
If you look at the 22" screens, you see a marked improvement between the 5ms models and then the models which feature overdrive as well (offering 2ms G2G listed spec). This is likely to be a similar pattern in the 24" market, but there haven't been a wide number of models (or tests) in this sector where TN Film meets overdrive. In theory, it should improve responsiveness, and if it is well controlled, it could prove a positive change, and could make it a little more responsive than the 6ms G2G VA generation.
It's hard to say really. Which Acer model are you meaning as well?
Also, this whole "PVA = input lag" thing which some people seem to cotton on to, it's not really proven or well understood....it is very rare to have input lag on a screen which actually causes any real problems in practice, just be aware of that.
