Hi Mr Surrey,
Typically with a Modular route, you don't have to complete a pre-entry selection. Payments are made Pay-as-you-go, and generally on completion you will have more hours in your log book vs integrated due to the longer period of training, and the need to maintain currency on aircraft.
Like RTN11 has stated, Integrated is a full-time jumble off all modules together. On an Integrated course, you could potentially be studying ATPL theory in the morning, flying in the afternoon.
I see the difference between modular and Integrated being;
During a Modular course, after 3 Months training I decide this isn't for me. Thankfully all is not lost, as I have completed my PPL license during these 3 Months, and therefore I will walk away with a PPL License.
Whereas, because an Integrated course is not 'structured', although after 3 months hard work, I would not of gained ANY licenses yet.
Subsequently, this is why Integrated is more of a risk, and you will almost definitely have to complete a pre-entry selection to ensure your ability/aptitude of completing the whole course meets the requirement.
"OK thanks, does this mean modular has more deadtime or does modular require more man-hours to complete?"
This is where the flexibility of Modular comes in. The amount of 'deadtime' and 'man-hours' to completion depends on how fast you can afford the modular route. If you have the full amount of funding, time and dedication you can complete a Modular course just as quick as a Integrated course. However if you don't, you could complete your PPL, then have 6 months off to save for Hour Building/CPL...etc.
If unfortunately, like many, funding is an issue, and your trying to gain your license by doing 1 hour every two weeks then yes, it will require more 'man-hours' to complete as you'll end up re-capping on last weeks flight every lesson.
I hope this helps, and more importantly makes sense as I have had a couple of beers this evening!