As always depends what you want to do and how your skills are. Some ships have a bonus to scan strength, some not but may be more suitable for other reasons.
To give you examples, I‘m using an interceptor for relic sites, the speed and nullification compensate for the missing scan strength bonus. Else solo I‘m flying T3D and T3C with combat probes for PvP, wormholes, and DED sites. But T3Cs would be a bad choice for relic/data sites only, they are just too slow.