Yes but some keys developers,engineers and designers from Smilebit went to Sports M&D in 2004, specially the part who made those simlation sports ones.
The rest went to Amusement Vision and take part of CS1 R&D after.
Looking at credits, I see a good amount of people that took part of Beach Spiker, Sports Jam, Virtua Striker etc. Sports sims take different development capability I think. And none of the people that made Hundred Swords, Jet Set Radio, GunValkyrie, Panzer have made sports games.
Sports R&D only existed for a year or so, after that all the Mario & Sonic were made in a anonymous Sega of Japan group (either CS1 or CS3 not sure)
Alot of people who made Kingdom Conquest and subsequent mobile games are from Smilebit actually too.