VS23 a343 operational question

so my flight from lax to lhr this wednesday is on an a343 (some of you may have read my previous post on this).
i'm looking at the in-flight entertainment page and noticed one of the A343 (rainbow lady) actually has the VERA on demand system (instead of the horrendous VERA reel aka odyssey).
so my chances are 1 in 4 of getting the VERA on demand system. is anyone here able to use their expertise of virgin operations and gamble, based on current scheduling, which of the 4 A340s i'll get?
i'm looking at the in-flight entertainment page and noticed one of the A343 (rainbow lady) actually has the VERA on demand system (instead of the horrendous VERA reel aka odyssey).
so my chances are 1 in 4 of getting the VERA on demand system. is anyone here able to use their expertise of virgin operations and gamble, based on current scheduling, which of the 4 A340s i'll get?