I’m not familiar with either of these interfaces but the first question I’d ask is “Is there a dedicated ASIO driver?”.
A quick Google suggests that though there used to be it doesn’t seem to be around anymore and users are being advised to use the generic ASIO4ALL driver. This may work fine but generally you get lower latencies with drivers written specifically for a device so I’d be a little wary. I’m not saying it won’t work, I’m sure it will, it’s just since you’re specifically after low latency this is something to consider. Under £50 is quite an ask I’d say, mainly as most (all?) of these devices also include microphone amps which you don’t actually need but which obviously adds to the cost.
If there are any Behringer user Forums you might want to ask there if there are people getting good latencies with these interfaces…or maybe someone else here will have some experience (but they’re not interfaces I’ve ever seen mentioned on here).
Finally what is your current latency? Acceptable latency varies from player to player.