Jamie did this a few months ago hope he does not mind using it again great ref point for encap
Dynamall and Hydrox will need a longer dwell than Surround as they are on the acid side of the pH scale.
Looking at the main encap products I have used the difference between them is in their make up.
Dynamall contains detergent, deodoriser, copolymer protector, oxi booster (5%) and the encapsulation polymer
Surround contains detergent, encap polymer and perfume depending on version
Prochem Procaps - as Surround, Woolsafe approved.
Chemspec Rotobrite 2 - Detergent, encap polymer, hydrogen peroxide (5-10%)
HOS Environ - High Surfactancy for zero dwell and greasy soil, hydrogen peroxide (?%) encap polymer. CRI approved.
Releasit Hydrox contains Encap polymer, Hydrogen Peroxide (10%) & Detergent. It is also further on the acid side of the pH scale (3.5) making the additional booster more stable in the bottle and effective on problem acid side soils, its Crystalon HP polymer is different from the regular Crystalon 3 in the rest of the range to make it more compatible with the oxidiser for improved cleaning.
If protector is required it can be applied afterwards.
Why one worked better than the other will be down to the above factors/features of the product and obviously the carpet & soil type.
Obviously there is only so much "space" in concentration for each ingredient so choosing what you actually need for the job will determine what to use.
Dynamall gives you a bit of everything thrown into the mix making it a great all rounder.
The Releasit range lets you tailor what you actually require to get the maximum performance.
Basic - Straight cleaning and encapsulation (no perfume or protector) 1:16 or 1:32 dilution
DS1 & 2 - Double Strength with Flurochemical Protector, Tea Tree Extract 1:32 dilution
Bio - As DS1 & 2 but no protectoe and EDFA approved
Punch - Surfactant loaded for greasier areas and zero dwell time, Protector, Tea Tree Extract variable dilutions as a pre-spray (before DS2 or Basic), Extraction Rinse, Spotter, Bonnet Cleaner (doesn't foam like the others so better for spray application), Upholstery Cleaner (synthetics) CRI approved.
HydrOx - Cleaning & Encapsulation (acid side) with peroxide booster. The favourite for wool carpet, organic soils & spills and upholstery cleaning.
Surround, Procaps, Releasit Basic, Punch & DS2 could all be boosted with Sodium Percarbonate (Chemspec Energizer, Prochem Oxibrite, Craftex Energybryte) if desired. Not something I have found the need for with the Releasit range.