What is the right kind of syphon to use for fish batter? [See below re possible dup]

I've seen recipes for fish and chips call for the use of a CO2 syphon for the batter (looking at you, Heston!). So I'm looking to buy a syphon (I don't have one yet).

I haven't seen explicit comments in any of the recipes as to whether it should be a "soda syphon" or a "cream whipper" but they are explicit about use of CO2.  

Most of the product web pages suggest CO2 &amp; N2O aren't interchangeable.  I'm not sure if thats due to physical limitations of the devices, or just in the interest of avoiding funny tasting whipped cream or weird looking "soda"!

Soda syphons seem to be a lot cheaper, but I'm doubtful if they would handle fish batter well - presumably they are designed for less viscous liquids like water.

Can one use CO2 cartridges in 'cream whipper' syphons?  They latter would seem better suited to the texture of the batter.   

I understand (slightly, anyway) the various issues around taste / texture etc between CO2 and N2O; but have no idea if the cartridges are physically compatible, or if there are critical pressure differences.



This was flagged as possible dup of question about interchangeability of CO2 and N2O cartridges.  I don't think it is.  As one of the comments here says, I have specifc use in mind.

I had looked at that question and, unless I misread it, the answers are mainly about the chemistry, as it were, and not the mechanics of the syphons.  They seem to imply that the cartridges are (often) interchangeable; but many of the product web sites say specifically to use one type or the other, but they don't make it clear if that to do with the device or the recipe, as it were.
(Sorry for long explanation here; If I were able to comment on others' questions Id put the comment on the other post).
Get an ISI whipper (no affiliation), the model that can take both hot and cold.  It accepts CO2 or N2O.  They have multiple safety controls built in, are versatile  (especially given your interest in Heston), come in multiple sizes, and are relatively easy to clean.