Two decisions drive almost every toilet bowl purchase: rimless or rim, and one-piece or two-piece. Get these right first, then narrow by finish and price. Here's what each actually changes, grounded in real listings from the catalog.
Rimless vs rim
A rim toilet has a lip around the inside of the bowl that the flush water runs under, which is also where limescale and residue tend to build up out of easy reach. A rimless design (like the VERA CERAMICA rimless Geberit & Tornado model, or VERA's C.032 and W.024 rimless one-piece closets) removes that lip so water sheets down the full bowl surface, making cleaning more straightforward. The trade-off is largely cosmetic and cleaning-related, not functional: a rim bowl still flushes properly, it just has more surface area to clean.
One-piece vs two-piece
A one-piece closet has the tank and bowl moulded as a single unit (e.g. Aalto's ATAL8010 and ATAL8060). A two-piece closet has a separate tank bolted onto the bowl (e.g. Aalto's ATAL8050). One-piece designs have fewer seams for water and residue to collect in, and tend to sit lower and more compact. Two-piece designs are usually the lower-cost option in a given range and are more common where a specific tank height or style is wanted separately from the bowl.
Flush technology
Some listings specify a flushing mechanism beyond the standard gravity flush, for example Double Vortex or Tornado-style flushing, which clears the bowl using a rotating water action rather than a single straight-down flush. Aalto's ATAL8010 and ATAL8050 both list Double Vortex/SuperSonic Tornado technology. VERA CERAMICA's rimless Geberit model lists a Tornado flushing system with a stated 10-year warranty on the flushing mechanism specifically, not the whole bowl. Check what a warranty actually covers on any listing before assuming it's the full unit.
Size and roughing-in
Every bowl in the catalog lists overall dimensions and roughing-in distance for both S-trap and P-trap configurations. The Aalto ATAL8010, for example, lists 660x360x700mm with S-trap at 150mm or 250mm, and P-trap at 180mm. Measure your existing outlet before choosing a model; a full walkthrough of how to do that is in ThatRenoStore's separate S-trap/P-trap guide.
Seat cover material
Seat covers in the catalog are commonly listed as Urea (UF, Urea Formaldehyde Resin) material with a slow or soft-closing function, for example Baron's BAUF05/BAUF06 seat covers. Urea is a harder, more scratch-resistant plastic than standard PP seat material, which matters if the seat gets heavy daily use.
FAQ
Is a rimless toilet bowl worth the extra cost over a rim bowl?
It depends on how much you value easier cleaning. Functionally both flush properly; rimless removes the lip where residue collects, which is a cleaning and hygiene difference rather than a performance one.
Do one-piece toilets cost more than two-piece?
Generally yes within a comparable range, since a one-piece mould is a more complex manufacturing process. Compare specific listings rather than assuming a fixed price gap; this varies by brand and finish.
What does 'S-trap 150mm or 250mm' mean on a listing?
It means that model is available in either roughing-in distance, so check which one matches your existing floor outlet measurement before ordering. See ThatRenoStore's S-trap/P-trap guide for how to measure it.
Weighing up rimless against rim, or one-piece against two-piece? The full Toilet Bowl collection lets you compare both side by side, or check Plumbing Fittings & Valves for pan collars and connectors.