Depends on what you want in an aircraft. They are very different aircraft in terms of overall design and use cases, obviously. I’d say for most people, the 146 is probably the better choice - it just looks a bit nicer in the cockpit textures, it’s a bit more accessible - and it’s a bit more than half the price of the MD.
However, if you’re a fan of this type, this is as good as it gets right now. And probably as good as it’ll get in this sim for this type. There’s a reason why this is considered by many to be the yardstick by which other MD’s are judged. And with their track record, it’ll probably get a fair few updates along the way.
Is it perfect? No. If you’re on the fence about it, probably give it a pass enjoy the 146. This is not an aircraft intended for every simmer.