I found them to be very similar in terms of learning TBH. Each CAD product has its own annoyances. They all pretty much have to offer the same features to be competitive, so you aren't going to see much between them there. However, the "Fusion" bit of F360 refers to the way they have integrated a fair bit of other stuff from the Autodesk product range including professional CAM, thermal/stress/resonance simulation, proper surface modelling, professional rendering etc. You normally get to pay extra for these.
For us, the most interesting bit is the full multi axis CAM. All other CAD products require 3rd party / additional s/w to implement CAM – at significant cost. For instance, if you want to buy the proper 3D CAM from Sprutcam it will set you back about £1k last time I looked. The 3rd party CAM plug-ins for Onshape aren't much better although at least they are rentals rather than purchases, IIRC.
The worst thing for hobby users is the current "retail model" that is the norm for CAD products (except for F360), where you have to "buy" the CAD software but also pay for ongoing "support". The current Alibre comes with no updates or support unless you buy it one year at a time. Not certain how that plays with consumer rights here in the UK but they seem to get away with it. I expect they my help you to get up and running to avoid you demanding your money back but beyond that you will surely be on your own.
I know from experience that Solidworks get very uppity if you let the "support" lapse and then try to renew it – good luck trying! But conversely, if you have any problem installing or running SW they won't help you if you haven't coughed up for the support up front. This whole approach can only actively encourage crap software development – the more bugs they build into the product, the more incentive there is for the customer to pay for "support".
Murray
Incidentally, Alibre DOES require internet access to check in with the licence server periodically. Fusion will work offline for up to 360 days.
Edited By Muzzer on 05/07/2017 11:01:28