Quoted from Deez:So I own both. I really like houndini but the flippers feel like garbage and the shots don't have a good feel to them. The machine itself is better built than avengers but they really need to fix the flippers. There is a reason you can get them with low plays for under 6k all day. Before anyone chimes in on fixes, I have done them all including updated power supply, eos switches,.dropped the alignment.etc. while it's better than it was they're still bad.
I'd spend some time on houndini if you're seriously considering it.
I concur with this post. I also had a Houdini and the flipper power drove me nuts and is a much slower pin then Avengers by a long shot. Modes are fun, but there’s a lot of stop and go versus amazing flow and fast shots in AIQ. These are two completely different pins and like others have said you’d really have to give them both a few plays to determine what you like better.