The best choice is the one that fits your available space, desired temperature, maintenance tolerance and budget. Compare the whole setup rather than judging the tub alone.
Laydown tubs feel familiar and spacious. Upright tubs can save floor space. Portable tubs trade rigidity for easier storage and movement.
A powered chiller removes the need to keep buying ice and makes repeatable temperatures easier.
Filtration and sanitation affect how much work it takes to keep the water usable between sessions.
Measure the tub, chiller, access path and service clearance. Plan for drainage and a suitable power source.
Frequent use makes convenience, filtration and temperature control more valuable.
Tub dimensions, entry height and body position can matter as much as headline specifications.