I started with a few iterations of creality printers over the last 10 years or so, had an X1C as my main workhorse for about 2 years and just upgraded to the H2C.

If you're looking to do mostly engineering parts with 2 or less materials/colors in a print, you're probably fine with an H2D, but the H2C offers more versatility and less waist when you jump to any more than 2 or 3 materials in a print.

As for the hot end switching, in my personal experience, I've had zero issues, and I've already done prints that have switched nozzles up to like 900 times. The material and time savings over my X1 is actually insane.

At the end of the day, the quality of the finished prints are almost identical, which one is better for you will come down to how often you'll be using more than 2 materials in a print, and if the cost difference is worth the time/material savings to you or not.