I have cruise on mine.

You probably do, also.
I do on the garden tractor (tractor in name only

). Didn't notice that feature on the real tractor. But I found this video
that compares the 1538 (1500 series made by Mitsubishi Japan which is 35% owned by Mahindra) to the 2538 (2500 series made by TYM - Korea). They have the same engine but I guess otherwise do not share design features. The local "leftover" 1538 was sold a few days before I started looking, if it weren't I could have gotten that instead of the 1533 for a couple thousand less. Oh well. Anyway, apparently the 1533 does have cruise.
I looked at the leftover 2538 since the specs between the 1500 and 2500 series are very close. I could have gotten the 2538 for even less (MSRP is less to start with) but my height (6' 2") got in the way. As is noted in the video, the seat in the 2500 is lower and that meant that my knees were up, lacking thigh support. I've never been able to do the "catcher's squat" and get back up, poor knee design I guess. And that hasn't gotten better with age. If I were to sit for even half an hour with my knees locked up, and they would have to be to keep pressing on the accelerator, I would have a hard time walking afterward. I actually have more legroom from that perspective on my garden tractor. The higher seat in the 1500 gives me more extension and support.
Secondarily, the seat in the 1500 rotates backward to use the backhoe. That can't happen with the lower seat on the 2500 so its backhoe has its own small, low back, seat. Again a leg room problem for me in the backhoe "operator's station". And it also means extra length behind the tractor. BUT, if one were to be digging a trench AND had an assistant, it would be quite convenient to have a separate seat for the backhoe. One digs, the other moves the tractor.
There are other things I liked better on the 1533 but those were the 2 main reasons I chose the 1533 over the 2538. A shorter person may not have those issues and can save some money if there aren't other things that make the 2538 less desirable for them.