What's the role of the pack? Everyday on your person EDC, car emergency pack? Because from what you have in it it looks like you're not sure what it's for. If it's for on your person you're wasting a ton of space and weight with redundancy. No need for the ratchet/bits, or 2 MT's, or giant shears. You should have everyday useful items- pens/paper, chapstick, lighter, nailclippers, first aid. And if it's for a car you should have the common things in it- fuses, alcohol wipes, MT, light (head mountable preferred), with a separate trunk pack for the bigger things- pliers and ratchet set, jumper cables, etc.
As for your original question- the difference between the original and jumbo- I can't answer. You should really consider first what the role of the pack should be first.