the overall picture is more than presentable, because at least the JVC KW-AVX840 looks in it as intended but failed. the radio is forward approx 1cm further out than the panel itself, the reason for this may be the added rings mounting depth.
my recommendation, rather pick up the original VW, although this is, according to VW, a single DIN with pocket this is only plugged and trouble can be taken out, then you have simply because removing means Stands (eg with a carpet knife - costs about 1 minute) to Visually it looks Nothing at all and the Radio tight and flush there where it should be.
who attaches great importance to the appearance of the interior, should stay away thereof.