Unfortunately LCT have slipped over the past couple of years in terms of QC and by failing to look at what their competitors are doing (magwell spacer inclusion by E&L). Admittedly LCT are starting to roll out their QC gearboxes. For me the biggest draw to LCT over E&L is that they are far better when it comes to aftermarket parts compatibility.
@Sniper780 - Whenever I look at pricing I'll try and stick with the same product in order to assess it fairly. If you start heading down a route of "well x is the nearest competitor" then it opens the door to a slippery slope, at least in my opinion.
When it comes to the GP-25, I was attempting to treat it fairly as they still seem to hold a lot of appeal to many (I'm assuming because of how iconic it is). Admittedly given the choice between the GP-25 and GP-30 I'd opt for the GP-30 on every occasion. My reason for this would be, as @Sniper780 rightly pointed out, based on the fact it'll accept standard 40mm rounds.