My own craig's list score and OTS questions

I was messing around (always Dangerous) on Craig's list today looking for a cheap used smoker. I just got a dozen fresh salmon filets from a friend who went fishing in Alaska last week. After reading about fish oil problems, I was worried about attempting to smoke them in my new (only 5 cooks) WSM. I did not find a smoker, but saw a 22.5 inch copper OTS. Had to snag it for $40.00. I currently use a 16 year old webber kettle for steaks and grilling. I opened to box and confirmed the 2011 date code. I am not too familiar with the ots's and the otg's. What are the differences between the two? The OTS has a funky lower vent system, at least different than I am used to with my old wood handled grill. Guessing you can adjust all 3 with "one touch", hence the name. How do those who have used them like them. What does the OTG offer? I can see in pictures the bucket thingy under the kettle. What advantages does that offer. Probably stupid questions, but I have not put any study into the evolution of the kettles. Nothing was wrong with my old one, just couldn't pass up the bargain and the copper color is cool! Thanks in advance for any comments.

That is correct. I just picked up a hinged grate at HD to replace the well used 16 year old one in my old kettle. Will just use it with the OTS and store the old grate with the old Kettle in the attic. Appreciate the response!

Brian, don't have the room to store both the WSM and more than 1 grill. I store my grills and smokers out of the weather in the garage. I am all ready in the habit of lifting the whole kettle and dumping all ashes in the trash after it cools. Usually wash with the hose and a nylon brush. Works for me and has resulted in the old kettle being in remarkable shape after 16 years of use. I have never had the need for 2 grills At the same time. The only modification I make is put a bolt and screw thru each leg at the top so the legs do not come loose. Thanks for your reply and have a good weekend.