The short answer is probably “both” but the full answer probably depends to some degree on what you want the 130 hour figure to come down to and what kind of money you can or want to spend.
I don’t know specifically what Premier Pro needs in terms of resources but more CPU cores tend to matter more than a higher clock speed to a large degree. More RAM is always good, but this is less of issue if you have a very fast SSD, such as any internal that Apple has offered recently. I don’t think any spinning rust is going to be worth your trouble, Fusion or otherwise.
More than that though, a high performance graphics card would be worth sacrificing other things for. Probably in your case, the size of the internal SSD. I happily live with 256GB SSDs on the machines I use, but some need more.
If you’re happy to have an iMac then you should get slightly better value as it costs extra to squeeze things into small packages. I would think about something like this:
27" iMac with:
- 3.6GHz 8-core ninth-generation Intel Core i9 processor with Turbo Boost up to 5.0GHz
- 16GB of 2666MHz DDR4 memory
- Radeon Pro Vega 48 with 8GB of HBM2 memory
- 512GB of SSD storage
I would also wait a couple of weeks as there are rumours of new iMacs around the corner. Possibly MacMinis too, though I doubt they would have the grunt you would like.
If you’re able to find out what Premier Pro needs most, and that info should not be hard to come by, then that will help determine your priorities also.