The GP-310 immediately feels rather cheaper (in fairness, it literally is, but you’re still looking at nearly £3k). Although the Berlin setting again feels the most comfortable, it has less body than on the GP-510 and all three (Berlin, Vienna, Hamburg) now feel a little muffled. It was interesting to compare the sustaining power of the individual notes on both instruments using Fauré’s Nocturne No 4 in E-flat major, bar 8, where a D-natural must be sustained over four whole beats in slow tempo. The GP-510 felt like a ‘normal’ piano and there was no problem. With the same settings, and the same weighting and projection, the GP310 found the note disappearing well before the next bar line: much more ‘punch’ was needed.
Nor do the GP-310 pedals feel natural like those of the GP510 (the Vienna setting on the GP-310 sounds like you’ve got the soft pedal down permanently anyway). Plus, some of the notes sound like they have a little ‘spike’, as if extra harmonics have suddenly been added, so it is not 100 per cent even.
If I were to spend £3,895 on the GP-510, I doubt I would be disappointed. But if shelled out £2,735 for the GP310, I definitely would be disappointed. The GP-510 is infinitely better, more responsive and feels like an acoustic instrument, whereas it’s easy to detect the compensating aspects of the GP-310. My advice would be to dig deep in your pockets if you can. IP
‘The Berlin Grand is the brightest and most comfortable to play’
International Piano Guide to Instruments & Accessories 25