What is the difference between a Cobra Class 18 upholstery and leatherworking machine

[Flcoconut]

I am looking at buying a flatbed sewing machine for doing some wallets and canvas bags. I think the Cobra Class 18 sounds like a good choice for the jobs. America Leatherworks is selling 2 different machines in their web listings. The 1st is an upholstery machine. The second says it's a leather machine. There listings sound like the same machine. I don't see anyone else including Leather Machine listing separate machines. I plan on using it for both. Do I need to outfit it differently for the 2 different materials? Has anyone purchased a machine through this seller? 

[Wizcrafts]

I've never heard of that dealer before. Can you post links to the machines they are selling that you are interested in?

That asked, any upholstery class sewing machine can also be a leather sewing machine. A lot of upholstery is done with 4 ounce leather. That comes to 8 ounce seams and more when doubled down and felled. One main difference is that leather is supposed to be sewn with a leather point needle. Another is that with the exception of upholstery and garment/chrome tan leathers, one should use a machine with smooth feet. Vinyl and cloth sewing machines with dual feed have teeth on the feet to pull the material through. They will permanently mark veg tan leather.

This brings us to a third difference. Upholstery walking foot machines not meant for veg-tan leather can be dual, top and bottom feed, with teeth on the feet. Walking foot machines meant for veg-tan are usually triple, or compound feed, with smooth bottom feet and needle feed. The work can slip a little in compound feed, which can be used to one's advantage to force stitches to reach a certain point, other stitch hole, or corner. Dual feed machines are harder to cheat stitch length on.

So, as the dealer what kind of walking foot machine is A and what is B. If you plan to sew veg-tan leather, get a compound feed walking foot machine.

[Flcoconut]

These are the machine listings from the dealer.

https://americanleatherworks.com/collections/leather-machines/products/cobra-class-18-needle-feed-walking-foot-machine-upholstery

https://americanleatherworks.com/collections/leather-machines/products/cobra-class-18-needle-feed-walking-foot-machine-1

I did reach out to the dealer to find out what the difference is. This was the answer " The Machine for Upholstery has been modified and optimized for sewing through drapery and other upholstery materials such as canvas. These modifications are as follows. No Speed Reducer, Modified needle and walking foot timing, and different feet for upholstery.  

The description didn't make it clear that the upholstery machine had so many changes

I don't think the changes sound like they will be worthwhile even with the lower price. I am going to go with a different dealer and a Factory standard Cobra Class 18. I don't have a lot of experience with machines and don't want to deal with a machine that isn't factory standard and will be harder to troubleshoot if needed. 

I appreciate  your words of wisdom