The other difference is the Mafell does not use a blade guide on the rear of the blade, the blade is extra thick but more expensive at around £20 each. Not having that rear blade guide also means you can fit the blade in the other way round and work from below whilst still having the support of the base.
This is one tool where the OEM has really looked at the issues people have with jigsaws and fixed them so it is capable of cutting straight and not just curves so although not cheap it is a buy once tool so actually over time very cost effective.