But you need to understand the difference between poundage and progression. Poundage comparisons only have validity when comparing the same mode of training and rep speed. It s possible to use bigger poundages but without necessarily having progressed, just as it s possible to use reduced poundages and yet still make progress. It s the same thing with speed of motion. You will use a lot less weight going at a slower speed.
Poundages are only relative when measured against the same modes, rep speeds and equipment.
The workout with 375 lbs may even be harder and take more effort because it s on an entirely different scale to that used for the 530 lbs. You can t compare numbers at different rep speeds. Just focus on progression within the speed used. Many people will not even consider using certain machines, or training at a slower speed, because they will have to train with lighter weights. It s an ego thing or numbers game with them.