That's quite a welcome

Accounts are usually created right before they are first used... and the question is absolutely genuine. I did search the forum - in fact the reason i posted here, and I suspect the reason you might get a lot of "quick Severne questions" here, is exactly because it is where you end when you go looking on the internet for people reporting on their experience with severne gear. (I'm from Denmark, not a very widely used brand here so not a lot of input to find locally).
I don't see that the difference between 140-190 and 150-200 has been covered previously. Closest is that one poster reported issues with using the wave boom for freeride sails (slim profile) - which means the 150 version does not really score on a 'can rig up with a larger sail on a calm day' argument.
Question is being posted now because I'm in the process of placing an order with the only severne dealership in DK, which happens to be placed in the other end of the country (going there for hands-on would cost me at least half the price of the boom). They offered a good price on including an enigma in the deal, but they only have the 150 in stock right now, and their response to my questions felt biased by this. Still a pricey bit of equipment, and since I assumed there most be some sort of point in both versions being produced, I thought it a good idea to seek some input to the decision.