With bag gloves the padding is more stiff, training gloves are used for sparring and mitts. Fight gloves are for fighting with.
14 oz Ringside IMF Techs on heavy days. I am positive they are bigger than 14 oz. 12 oz Ringside traditional bag gloves on light days. I would not recommend ANYONE to buy the IMF Techs now. They are horrible. Nowdays many companies make a common bag/training glove. Especially higher end brands. A 16 oz training glove should be fine, but you may need to replace them faster.
I also have the IMF tech bag gloves. I haven't had any problems with these gloves but I could understand why some people don't like them, I heard the older versions were better made.