I have run or have fix 90% of the equipment on the market for over 20 years, Fuel savings are huge with Volvo with the deutz motors that they use ,but be warned if you have computer issues the dealer will have to be called. They use a program called Matisse to download the data from one of the three computers it uses. Only the dealer can pull these codes, Now I am not saying Volvo is no good it’s one of my favorite pieces of equipment on the market but it is very difficult to fix any electronic issue that it may have, you cannot even use a test light on some of the problems down the road without taking the chance of burning out part of the 3 computers circuit boards and absolutely do not do any welding on a bucket attached to the unit, disconnect the bucket from the machine before welding or you blow the computer , tons of features and very well constructed ,lots of power, great seat warmers (burn your ass Hot) and you will never find another machine with as many buttons as a Volvo just put your best operator in absolute no test drivers , It’s like giving a 19 year old a Porsche not a good idea something will get broken , as for the cat 320s I have two in my yard both are older models ,the new models uses C6 C7 motor absolutely stay away from any cat using these motors they are junk tons of problems, We have three gmc multi lift trucks with these motors in them ,one had engine damage from pump issue that 600 hours left on its warranty and the other truck just blew its motor 15k to repair and the motor was 100 hours over its warranty 88000 kms what a joke ( fighting with cat over this) 2 out of 3 trucks had problems not very good product. I would pick JD /Hitachi unit or Link Belt/Case unit over the Volvo if you are not very confident with your operators, less buttons to break for the test drivers.
One other thing you got to love the marker lights in the Volvo counter weight.