Just picked up a couple of these (Bone and Loon), do these fish just like every other WP...straight retrieve, vary the speed?

yep, same as always. you can always pause and go also but that applies with any of the sizes

Straight retrieve has always worked best for me. 

Another for the straight retrieve. However, being a musky angler as well, I am known to change directions with my topwater. I can't say it's proven to work on bass, but my philosophy is if it's a tough bite, changing the cadence or direction may be the ticket! Just a thought if the bite is tough.

With that bait you will just have to try different retrieves to see what works at the time.  If I am close to a big heavy clump of grass I will steady retrieve up to its outside edge, then pause for a minute for takers and sometimes it works and sometimes it does not.

Depending on the wind I fish the WP differently. On a windy day with chop on the water I fish it straight retrieve.

 

On a dead calm day I fish it like a popper. Cast out let it sit till ripples die out then move my rod a bit to make the tail plop a bubble or two stop, wait repeat. The 4lb Smallmouth in my avatar on the left was caught that way on like glass calm water.

I generally use a steady retrieve, but occasionally will make a couple really fast turns of the reel handle to create a burst of speed.  That seems to work for me.

Slow, steady retrieve 100% of the time for me. 

Cast, let it sit for longer than you think, give it a rip and hold on.   If no taker slow retrieve to the boat.