The problem with a rating system is that so much is personal.
The discussion over the Sabretooth putter proves the point. I have no use for it, but I have Champs and TL's in my club that swear by it. I like the top Taylor Red Spider much better, but it is hardly different than my Nike, so I stick with the latter.
With woods and irons, different players need different things. Some are better with slower meter, some need forgiveness, some prefer precision. (In my case, I prefer forgiveness in driver and 3w, precision in irons, and meter speed is not that important.) Start by knowing your needs.
My best advice: (1) Ask people, starting in your club, who have used the club. Club forum is good place to start. (2) Free rental. (And remember, one can rent same club 2x @ 24 hours each during the free rental period.) If still in doubt, rent for real or wait for next free rental and try it again.
For newer members at lower level, ask the top players in your about what they used (and why) when they were rising through the levels (although keep in mind, there are many more options now than there were 4 years ago when I was rising from the 30's to the mid-80's). In good clubs you will get honest, but still sometimes different, answers. Then you have to decide.