I’d get the i5 Pro over the i7 Air. The MacBook Pro 10th gen is significantly faster in processor-intensive applications. Both the Air and the Pro could handle Zoom calls, but the Pro is likely to be quieter because it has a better cooling system (2 fans, plus a heat sink).
The CPU specs are a bit misleading. Though the turbo boost speeds appear similar, note that the Air can’t sustain those high speeds for very long (basically only long enough to launch a program or start a process), while the Pro can. The Air uses a 10W chip that tops out at 12W. The Pro uses a 28W chip (the base Pro uses a 15W chip that can top out at 25W). Simply put, the MacBook Pro 10th gen i5 can sustain all 4 cores running at 3.0GHz for an extended time, while the Air in that circumstance will settle in around 1.7GHz.
You are unlikely to tax the processor that much if all you are doing are Zoom calls and live streams, but if you think you will be doing anything more processor intensive (e.g. video editing), or have a lot of background activities during your Zoom calls, the Pro would likely be quieter with the fans running at a lower speed.
If you shop around, there are some small deals on the base 10th-gen Pro. I have seen it as low as $1649 through Adorama (though you need to click through a link from AppleInsider.com’s site and use the APINSIDER promo code). That’s the same as the i7 Air, though I have seen that model discounted by $50. In any case, I’d recommend the i5 Pro over the i7 Air even with the $150 list price difference, and certainly for $50 more. For the extra price, you get two extra Thunderbolt ports (and the ability to charge it from either side), a brighter screen with better colors, and the Touch Bar (which may be a positive or negative), along with the extra CPU power.