Jonsered 625 was the same saw as the husky 61, 48mm X 34mm bore and stroke. This is a finger-ported, medium-performance set-up, runs out at about 12000 rpm, no-load.
Jonsered 630 is same bore and stroke, but different cylinder with closed loop ports for higher rpm (13000, more power. I think there was a Husky 261Xp corresponding to this model for a while.
Jonsered 670 has more bore, 50mm, for 67cc. Similar, closed-port Huskies would be 266 variants and 268XP. There was no finger-ported model like the plain 268 in Jonsered catalogue.
The current 2165 Jonsered is a plain-vanilla performer, like the 625 was, but with a bit more displacemt at 67cc also. Past Jonsereds did not market a direct competitor to husky 272, but current 2171 is twin sister to 372.