Thank you, TP!The Q4 is outrageously expensive and, technically has less tools. I don't think the ratcheting bit driver on the Q4 is worth the extra $20. But, with that said, you do get the beautiful black leather case and bits with the Q4.My pick of the Q4 and Q3 would be the Q3. $20 cheaper ans has more built in tools The Q1 and Q2 is more simple. The Q2 has a blade, bottle opener/medium flat driver, and bright flashlight. The Q1 has a pen, bottle opener/medium flat driver and a very good pair of scissors. The scissors are so sharp and well ground, you could use one half of the scissors as a knife It is very subjective to one's needs though, but the pricing makes determining the best tool a bit easier. BUT, the Q4 leather case and 24 1/4" bits are an attractive feature.