Bit early but I was looking at the 6 probable teams leaving the Championship against the 6 that could replace them I'd say next season's league will be tougher
Out going:
Burnley
Sheffield United
Middlesbrough
Wigan
Huddersfield
Blackpool
Teams coming down from the Prem are always strong, parachute payments and all that - don't think it really matters who they are. Although a big club that's not used to the Championship, and absolutely capitulates with the fans all over their backs, would definitely be preferable.