Battery capacity & playtime: The listing says 2400mAh for the 1753. Check how long does it run at moderate volume. For outdoor/party use you may want longer than ~4 hours.
Bass performance / woofer size: While “4‐inch” is fine for general use, if you expect strong bass for parties or outdoor events, you might want larger drivers (6″+).
Output power / amplifier rating: 2 × 10W is modest. If you expect loud party sound outdoors, you might need higher wattage.
Connectivity: Confirm Bluetooth version, AUX input, USB/TF support, FM radio (range and quality), microphone input if karaoke feature is present.
RGB lighting & durability: Since the spec says RGB, check how bright/useful the lighting is and if the speaker has rugged casing, handle, maybe wheels for outdoor use.
Portability & build: Weight, handle or wheels, battery size, AC adapter included, cordless/corded operation, weather resistance.