Hi Zainab - I'll weigh in as someone who deliberated between the Bobby and the Saddle. I think the book tote is beautiful, but have never seriously considered it as an option so I can't weigh in on that one.
I LOVE the look of the saddle (but I'll admit I was an initial hater who thought it looked kinda weird); I also do think it may be one of those bags that just really shines in person. It's so unique looking and definitely a statement piece. However I do think it not fitting a lot is a real concern. To me, it is more of an occasional carry piece. I could fit my keys, small wallet, phone, airpods and *maybe* a lipgloss or two but this was a tight squeeze, playing tetris with things a bit. I think if you carried a thin cardholder instead of an actual wallet, you could fit a few more things in, maybe sunglasses on top, etc.
I ended up returning it for the Bobby because at the time I was really looking for a more casual, carry regularly type everyday bag. While ironically the leather on the Bobby is much more delicate than the sturdier leather of the saddle, I think the overall shape, look and aesthetic lends itself more to a casual, everyday carry. And I've been using it non-stop (well, as much as I leave the house these days...) since I got it and really do feel as long as you're relatively cognizant/careful with your bags, the leather is totally hardier than you would think, no scratches yet! The Bobby also definitely fits more. I'm assuming you're looking at the medium size, which is the only one I can speak to, but in addition to the things mentioned above I could also fit my kindle in if I wanted, and my sunglasses or eyeglasses with a case (but probably not both). It's actually not *as* roomy as I thought it would be, but it definitely fits more than the saddle for sure. The opening can be *slightly* annoying at times, but not a major downside for me. The back pocket on this one is perfect to fit a phone, I think I remember trying to put my phone on the back pocket of the saddle and it was definitely tight (and would probs stretch out the pocket).
Sorry for the overload of information, but I appreciated all the reviews/info I could get back when I was looking! If you search purseforum, there is a Bobby vs. Saddle thread I started when I was first deciding between the two as well, with other people's super helpful inputs as well.
Also all of that's to say...I think I'm going to end up repurchasing the saddle before the price increase! It really did make my heart flutter and it's a beautiful bag. It just depends what kind of bag you're looking for to fill your collection. If it will be your only Dior bag ever, and you're not looking for an everyday bag, I'd probably say go for the Saddle because it's so iconic and unique. However if you really want a bag that's more practical and can carry often, while still having a luxury feel/aesthetic, then go for the Bobby. I hope that helps!