I was gonna reflexively vote for H1, but voted for VG10 after thinking about it for a minute.
I don't have a ton of experience with SE, having only been converted by the 'SE fiends'
here in the last couple of years.
I really like my H1 SE Pac Salt, Tasman and Dragonfly. Just the other day I was digging around with my Tasman, grubbing out thistle roots - I'd probably never do that with any other steel, and the rustlessness and ease of edge repair is a wonderful quality.
But the higher strength/hardness of VG10 at that low edge angle is just something I like a little bit more. I like the shallower scallops on my only VG10 SE knife, the Emerson waved Matriarch a bit more too. I use the Matriarch as a gardening knife, like the Tasman.
Also I got a SE drop point UKPK in Gin-1 which is also a pretty cool little SE slipjoint, with shallow serrations and similar edge behaviour to VG10.
I find that after sharpening H1, I tend to get slight edge bending and rolling at stress points, with 'hard use', which causes very slight hangups. Nothing major that would interfere with getting the job done, I just like smooth cuts is all.
I'm looking forward to trying LC200N in SE.
Any comments on 52100? It's probably the hardest steel to be presented in SE so far - at least in terms of the full steel hardness. (It seems the high H1 SE microhardness readings that Crucible found in the mid 60s might need further research. To me, sharpening the scallops, they don't really feel like 66HRC steel.)