Hey

I have chance to get deal on new frame to replace one busted in crash. It has sloping TT while everything else I have owned have horizontal. Based on comparison of TTs, HT an angles, it seems the 58CM sloping frame I am looking at would be comparable to my 58CM horizontal TT c'dale. But I am a bit confused by horizontal TT vs effective TT and more generally am ignorant as to what factors I should consider when it comes to sloping TTs. Reading posts about frame sizes is only confusing me (Poli Sci major, what can I say?) Below are the geo numbers I have, are these frames comparable in size?

Current Cannondale with horizontal TT

SeatTube C-C 58
Horizontal Top Tube Length: 57.5
Seat Tube Angle: 73
Head Tube Angle: 73.5
Chainstay Length: 40.5
Bottom Bracket Height: 27
Bottom Bracket Drop: 6.7
Head Tube Length: 17.3

Frame I am considering with sloping TT

SeatTube C-T 56
Seat Tube C-C 52
Effective Top Tube Length: 58
Seat Tube Angle: 73
Head Tube Angle: 73.5
Chainstay Length: 41
Bottom Bracket Height: 27.8
Bottom Bracket Drop: 6.8
Head Tube Length: 17.5