Looking at this for a moment, it would appear that the seat frames are the same, but whereas the old cushion was curved at the top into the headrest piece. Oddly, it almost makes them look like the Primarius seats used in the 2007 FGW and XC First Class refurbishments. They do still look, frankly, awful though!The headrests are a weird shape, they look like they've been lifted from a different frame design and forced onto the old ones (which to be fair they may have been). It's a small detail but the tables are so much better, I always hated the bright orange fake wood tables Virgin put into them.
The pendolinos have always looked like they were ripped straight from the 90s, with "bubbly" details like the rounded columns, everything circular, and the first class arm rests. This refurb has managed to slightly tone it down but they do still look 90s with more refinement.

Virgin Trains Class 390 First Class
For some reason first class was at the rear, so I had to walk through...