In general, I'm finding the new monos have a more dynamic and meatier low end that makes the rock and roll stuff in particular much more involving at more realistic listening volumes.
The difference between this mastering and prior CD are marginal on some cuts, like "I'll Get You", more because the old versions are really quite good rather than the new ones being deficient.
If you listen at low volume or on a lesser system you might not hear enough difference to matter.
On a good system, at realistic volumes, the new ones succeed at taking things to a new and more involving level probably not equaled prior
Overall, I am not finding too much new that I have not heard before with the new early album monos, but it all draws you in further and sounds more lifelike. Overall, a more involving Beatles experience, which is a very good thing.
This effect overall is even more significant when comparing the new mono remasters of the latter albums to their earlier stereo counterparts.
One more thing. I do not have issues any issues with the dynamics of either mono or stereo versions included in the mono box set. Both are very, very good though the monos are supposedly technically superior. I am not sure I would go mono just for that reason alone.