Uno R2 vs Uno R3 (updated)

I've recently started been using a number of 3[.3]v peripherals with my Arduino/ATmega328 boards. With a very limited number of level convertors (initially none!) I decided to use these solely with microcontrollers running at 3.3v natively so that I didn't need to bother with shifting voltage between 3.3v and 5v. This meant I could only connect these items to 'breadboard' setups as my Arduino is a standard R2 running at 5v.

So I ordered a "cheap" Arduino Uno on ebay with the intention to modify the board to be native 3[.3]v.

There's a load of cheap 'uno compatibles' on ebay but I decided to be chosey and stick to one with an FTDI chip -- it seems the dirt cheap clones have migrated to other interface chips, but there seemed to be mixed comments online about how easily these worked with MacBooks. Even sticking with an FTDI-based board, I found one at under £5 and looking like an R3 compatible.

It's now been delivered and it appears (so far as I can tell) to be either a 'counterfeit' Arduino Uno R3 or perhaps a genuine board assembled more cheaply. To explain - unlike many other 'clones' it's got the trademarked Arduino logo (suggesting it might be genuine) yet some of the component alignment is off-perfect (suggest cheaper production).

So now I wonder whether I should butcher the "cheap" R3 or the order "genuine" R2....

Two weeks on, the "cheap" R3 still seems to be a pretty good replica of the "genuine" Uno - I've not found any issue as yet.