You have some varying requirements for your equipment and I wouldn't necessarily say you are getting the best lubrication if only using one type of grease. Start with your manuals. It should at least say what grade of grease you need. GC-LB is the classification for a general chassis and wheel bearing grease that should be adequate for your quad and truck.
Thing's to look for in a good high quality grease are a high Timken OK load rating; a measure of it's extreme pressure properties. A grease with good cohesive and adhesive properties. Meaning it stay's where it should and does not sling off thereby helping it to cling to metal, help seal out dirt by forming it's own seal and reduce grease consumption. It needs high water resistance and ability to maintain extreme pressure resistance in the presence of water. Just like with engine oils, UTF's and gear oils there are many properties that come into play to make a superior lubricant. With grease some of the key features to look for are load capacity, water resistance, cohesive/adhesive properties, compatibility, and temperature range based on application and oil separation characteristics.
If most of your operating time is in cold wet conditions I'd start with a grease that has a synthetic base and aluminum thickners. Schaeffers or AMSOIL might be what you are looking for for chassis use. Pennzoil 707 is a very good wheel bearing grease.