I've been shopping around for cordless stick vacuums, and found it confusing that some advertise their suction power in watts (typically 180watts, and Dyson is more powerful around 230watts), and some others advertise theirs as pa (something ludicrous like 1229000pa for an enolux). How can I standardise it so I'm not comparing apples with oranges?

Was looking at various sales this past weekend and wanted to understand the differences between models so I made a quick at a glance comparison chart for the Dyson v8, v11, v12, v15, and Gen5 (newest) + variants. If you have additional information about models or a key comment / when features were added, just mention it in the comments and I'll try to keep this updated.

General vs Absolute: The main difference between the models is the built in crevice tool into the want and a more advanced HEPA filter due to a change in EU HEPA standards. Absolute has .01 micron filtration (cyan blue filters), where the old one has .03 filtration (purple filters). I would suggest buying the absolute version due to the better HEPA filter and the connivence of the built in crevice tool. If anyone knows of other differences, please let me know.

General vs Outsize: Outsize Dysons are a larger format of the version provided. They allow for longer runtimes, extra capacity, and usually have larger versions of the cleaner and motorbars. The suction should theoretically be similar as the power of the motor is increased as well. This variant would be well suited to cleaning a large house in one go compared to having to swap batteries and empty the canister, as well as reducing cleaning time due to the larger motorbar heads. (Important to note, you would not want to attempt to purchase the larger size motorbars for non outsize versions as it would likely reduce suction)

Airwatts (AW): Air watts are calculated using the formula, (Air Flow (in CFM) x Vacuum (in inches of water lift))/8.5 = Air Watts. Dyson uses this to determine the suction power of the vacuum, but some argue this may be misleading.

Submarine Attachment Note: Dyson mentions on their website that the Dyson Submarine attachment is NOT compatible with other Dyson cordless vacuums as the Submarine version is a wet and dry vacuum. The attachment is not for sale to the general public.