About to order a Brooks saddle but have one question...

So I'm going to order a Brooks B17 saddle here in a minute but after pulling a number of random reviews they say if you break it in on one bike and then put it on another bike it does not reach its maximum comfort.

Here is my situation. I have been a recreational cyclist for ~4 years now and am looking to take it to another level. I want to do some regional touring. I am currently rolling on an entry level Raleigh road bike but am in the market for a LHT. After reading some of the reviews it sounds like the geometry of the bike plays a big role in how the saddle gets molded.

My question is, when I get the saddle should I break it in on my current bike or wait until I get the LHT?