Former Reason 7 (also FL Studio and Reaper) user here, been making music for 4 years, moved to Logic Pro X about a month ago. To the point, if you ask me: Get Logic, the deal is this:
Update from Reason 7 to Reason 8 = 129€/$, Reason 8 for new users = 369€/$
What you get: Workflow upgrade for people who don't use keyboard shortcuts, and 2 new amps to replace something (Line-6 amps) which are 10 years old.
Logic Pro X from app store = 179€ (cheap as fuck) over here
What you get: Support for 3rd party AU plugins and VSTs if you get the vst adapter, 5-10 times more effects and 90% of them sound better than than stock ones in Reason. You get the "Pedalboard", which makes Line-6 amps seem like a piece of crap. EQing is so much better; you are not limited of having one spectrum eq per track, unlike in Reason there's a proper linear phase eq, adjustable 6-48db/oct curves instead of having the fixed 24db/oct low cuts/high cuts, and you're able to do surgical equing easier than in Reason where the Q is limited to something like 4 in the spectrum eq, when in Logic it's limited to 100. Same goes for compression and limiting, there's a lot more flexibility. Audio editing is a lightyear ahead of Reason. Logic's clip distortion effect could be made a vst plugin with the price tag of 100€/$ and hardstyle/hardcore producers would still buy it. About the synths, I mostly use ES2 for everything else and Sculpture for ambient/weird/realistic/vibey stuff, same way as I used Thor + Malström.
Only thing that I miss from Reason is the 4Dyne (RE multi-band comp/limiter/gater).
Talking about the learning curve, apart from occasional googleable how-to-[thing you want to do]-in-Logic-Pro-X issues, the only thing that I struggled with at the start was Sculpture, which is cool as hell, but has so many knobs, it's really confusing when you open it for the first time.
Just my opinion, but I think Reason gets left behind in the competition. The price is rip off, considering what you really get. Pro Tools is over priced too, but it doesn't sink because it's an industry standard in many places, and some new people are like "hey all pros use Pro Tools, I need it too". However there's so many things missing in Reason, it's not worth of 300-400€/$ for new users. Same thing with REs: would you rather buy something that costs 100€/$ as an RE which you lose if you move away from Reason, or buy the VST version which costs 120€/$ and you can stick with it forever, no matter if you change daw 3 times (most VSTs from major companies are also available as an AU/AAX etc.)?