Let me preface that I do think Boyle is more of an engaging recruiter/personality.
However, we don't know if Boyle is a better recruiter, because talent evaluation is a big part of recruiting. Sure, this current crop of recruits are promising, but we have yet to see them play a minute of college basketball. Yes, they are nicely rated by services out there, but so was Hornbuckle. Relphorde and Burks were shown love by sites as well. (The entire notion that Burks was an amazing diamond in the rough is overplayed in my opinion - just because he wasn't a four star guy doesn't mean people didn't know about him during his senior season of HS. Sure, he was relatively unknown, but it's not like he was a two-star dud entering college.)
Bz got us Higgins, Knutson, Relphorde, and Burks. I think it's safe to say they're all solid contributors to the program. He signed STH, Tomlinson, Dufault, and Sharpe...the jury is still out on them, but they're still contributors. He had one bust in Eckloff, although that was just a gamble I think he made due to not having any bigs. He did a lot for the program.
Boyle's doing a great job so far, but we have yet to see what type of talent evaluator he really is. Roberson - yes, he's good, but for all the love fans have for him, he's not THAT amazing. Mills...I haven't seen one thing yet to like, but that's expected right now with him (next year too). Cain, Dinwiddie, Booker, I like them all. I'm impressed that Scott has shown up a little on the summer circuit. However, let's not be so quick to state Boyle is better than Bz, back-handed discounting what Bz did for CU. Boyle's only had two of his recruits play in college.