If I was mainly photo the S1R would be the way to go. They sell for less that the S1s and S5s on the second hand market
Moving from Fuji XT3, there was and is a definite ‘upgrade’ from APSC to FF, but it’s not especially big and no viewer would notice.
The 24mp FF sensor is maybe 10-15% better IMO in low light and back lit situations compared with Fuji’s 26mp crop sensor, but I’d say Fuji’s colour is better by a small margin, so swings and roundabouts as they say.
But the jump from 24 to 47mp is much more noticeable.
Again, it’s not anything that anyone would really notice on-line or on social media etc, but it’s very noticeable to yourself and if you care about such things as I do…
The colour is also better from the 47mp sensor. I have not seen anyone mention that one but IMO, it’s not just the improved resolution, but there’s something in this 47mp sensor wherever it’s coming from…and that seems to be a bit of a mystery except it’s probably the same as the Leica SL2 and Q2 but with some slightly thinner piece of glass/a layer with the Leica version?
And it’s not the Goliath unit some folks make it out to be…
Maybe with the 50mm f1.4 I am leaning towards, but we’ll see next year.
@IronFilm I’m sticking with my original Go for now as the combo with the lav mics & Sony recorders has been working mostly OK this year and it’s more a case of having backups due to others muppetry!