I'm not an expert by any means, so welcome others inputs, but responses below.
Having the full 20gbps USB 3.2 Gen 2 bandwidth for each monitor will allow you to use each of the monitors as hubs (as it's advertised) and be able to plug additional peripherals into the monitor directly - while keeping the most bandwidth available apart from the display signal. If you use a lower-bandwidth USB-C cable (and are using the max 4K @ 60Hz resolution with the monitor), there's a chance you'll have limited bandwidth available for a high-speed external hard drive for example (depends on what lower-bandwidth cable you'd be using).
That being said, the Mac Studio has a lot of ports, so I think this is less critical, as you could always just plug peripherals directly into the Mac Studio (vs the monitor) unless you have a real need to plug directly into monitor from a desk-organization / cabling perspective.
You should be able to daisy-chain if you want (these Dell monitors have USB-C upstream/downstream ports for this purpose), but I think the easier / cleaner way would be just to connect both directly to the Mac Studio with separately cables. Unless you really need all of the 4 Thunderbolt ports on the back of the Mac Studio for other peripherals, this way each monitor gets it own full lane.Ah, but do I connect the Studio to one monitor and daisy-chain to the second, or use two of the T4 ports with one cable to each monitor?
In this case, there's no difference between using a USB-C or a TB3/TB4 cable, because the monitor only has a USB-C (USB 3.2 Gen 2) port (20gbps), not a TB3/TB4 port (40gbps). So you'll be limited by the monitor port. So frankly you'd be wasting money buying TB3/TB4 cables (which are pretty expensive), and would recommend just get a USB-C to USB-C cable (try to get USB 3.2 Gen 2 cables for maximum bandwidth).And what are the differences (if any) if I use USB-C cables or T3/T4 cables?
Having the full 20gbps USB 3.2 Gen 2 bandwidth for each monitor will allow you to use each of the monitors as hubs (as it's advertised) and be able to plug additional peripherals into the monitor directly - while keeping the most bandwidth available apart from the display signal. If you use a lower-bandwidth USB-C cable (and are using the max 4K @ 60Hz resolution with the monitor), there's a chance you'll have limited bandwidth available for a high-speed external hard drive for example (depends on what lower-bandwidth cable you'd be using).
That being said, the Mac Studio has a lot of ports, so I think this is less critical, as you could always just plug peripherals directly into the Mac Studio (vs the monitor) unless you have a real need to plug directly into monitor from a desk-organization / cabling perspective.
I think bandwidth. I don't know the exact HDMI specs for the monitor / Mac Studio, but I would use USB-C over HDMI if you can. It's generally the better spec for display signals over HDMI. I would think of the HDMI ports more for compatibility (eg. Mac Studio HDMI port to use with monitors / TVs that only have HDMI; Monitor HDMI port to use with computers / devices that only have HDMI). You're getting 2 very newly released monitor / computers with USB-C / TB ports - I'd use them if you can.And what's the difference between connecting with HDMI and connecting with T4/T3/UCB-C?