Trying to decide on an eMtb

I've been thinking on buying an eMtb. I ride a few miles a week on trails, and enjoy riding my mtb, but I have previous injuries on my knees, and sometimes they hurt, and I would rather ride an ebike and give a rest to my knees on those days.

My budget is up to about $3k, and locally I can get a husqvarna MC2 for 2200, an MC4 for 3200, and a Gasgas ECA2 for 3000.

When comparing the MC2 and MC4, I am not sure I see the extra value in the MC4. It has a carbon frame but the exact same weight as the MC2. The battery is larger, and some better components, but similar weight, geometry and suspension.

The Gasgas uses the Yamaha motor vs the Shimano EP6 and EP8 in the Husqvarnas.

I am aware the parent company is the same for both and going thru restructuring, but I am not going to spend any more than that money at the moment, and seems like other brands start at higher prices for similar weight and lower specs.

I plan to buy locally because my local utility has a large rebate for ebikes, and doesn't seem like buying online would save enough to offset the rebate and the advantage of having a local dealer look after my bike.

I had a short test ride with a couple of Gasgas and Husqvarnas, but not these exact models.

Does anyone has some experience with these and can tell me what they think are pluses or minuses on each?