type uk and gb270 are the same car mechanicly pretty much so just consider them the same.
as said jdm is 2.0 engine and is alot less prone to failure than the 2.5, however the jdm engine is no longer a proper forged engine.
Which you go for is really up to you, i preffer the 2.5 over the 2.0 as they have alot more low down grunt, however if you go 2.5 i would make sure you budget for a proper rebuild just in case (cirac 3-4k for a basic rebuild done properly). It may never go, but then you might drive it 5 miles and it might go.