There is not a simple answer to what is better. I'm a Hafele dealer (so I need to keep my volume up and get a better deal) but some things I prefer RAS-depends on item, fit, cabinet construction, and budget.
I use RAS: tray dividers, trash listed below, mixer lift, on the door trash, stainless sink tilt out and in a few special cases the 444 or 443 series.
Everything else I use Hafele in particular: pullout pantries, base pullouts (SmartCab a lot) , on the door shelving, drawer inserts, Lemans, Suzi Q, Twister, other trash configurations, LEDs, closets, offices, garages, and laundry
If volume is your primary concern look up the dimensions. Trash pull outs depend first on the pail size and second on type of pullout. Better and bigger always = more $$.
For trash pullouts I have a strong preference for the 5349 series of RAS. If getting anything less expensive I lean toward Hafele. Undersink trash are selected entirely based on what fits the situation.
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Hafele vs rev a shelf
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