I'm running a single BK Advance bolted centrally underneath my seat powered by an iNuke DSP1000, which I fitted a couple of months ago. See my post above #251 and my thread
http://www.racedepartment.com/threads/getting-into-tactile-immersion-help-please.139738/
I've never had any other Buttkicker so cannot compare. To be honest, at 300+ watts I was expecting more. But probably I was expecting too much. Also, there are so many factors which can affect it's performance; construction of the rig, what the Advance is attached to and where, what isolation you have, which software you're using and how configured. And as I am new to all this, I doubt I have got all these things right.
With the Advance, I don't get the piston pang problem of the Mini LFE. I get nice engine vibrations now this had been added to the Sim Shaker Wheels software I am using, and a great kick when I change gear. The Advance certainly has enough power to let you know it is there underneath you when you hit a big bump etc.
Initially I was expecting it to shake me out of my seat. But I've come to realise that's not what you want. The tactile should compliment the ffb you get from your wheel, not overpower it. At first I had everything turned up, but then it doesn't feel natural. Now I am using it more subtilely, and I think the refinement and balance of the Advance works well with this.
If you intend to have one BK only, I would not go below the power of the Advance. I think that if you are using only one BK to give you all the sensations you want then any BK is going to struggle, whatever BK you choose. Some of these guys are using 6+ shakers which is going to give you a completely different experience.
So, to summarise, I think the BK Advance is up to the job of adding tactile to your rig with just one shaker on the seat. A big BK LFE will give you more 'shake', but it might not be such an all rounder as the BK Advance. And it costs more. Also, I think the Advance is a good long term choice because if I ever upgrade my tactile then 4 of them will be great in chassis mode.
I think
@signman has both the Advance and the LFE, so he may be able to give you a comparison, although he is using them as part of a multi shaker setup.
Any questions
@Ferenczy36 feel free to ask.