I’ll speak for Husqvarna this time.
The saw you said that you had before was a 45cc craftsman. I really think that with any 45cc Husqvarna or Stihl you will notice a difference.
With the Husqvarna I wouldn’t go with anything under the 445 (45.7cc). The 445 is a very good saw, and I really think it will outperform & out last your craftsman. I would stay away from the 455 rancher. The 450 or even the 445 will out cut & out perform a 455 rancher. Now the next ones up, the 359 or the 460 rancher I would skip on those two as well. I would go with the 346xp instead you would get about the same power output from a lighter 50cc “pro” saw. If you really want or need a bigger saw then that, the 357xp would be a very good choice. Its only 56cc but...
Those 4 would be my recommendation, the 455/450 if you are on a tight budget or the 346xp/357xp. I don’t think you will find too many saw better than the 2 xp’s.
Assuming that you have good dealers for both Husqvarna and Stihl, I would go with Husqvarna,
I have both Husqy & Stihl the ones I have right now are:
Husqvarna,
340, 345, 445 & 346xp
Stihl,
MS250, 280 & 260 pro
The 346xp is better than them all!!!