Well i was not aware of the 110, but i have the SW 450 and it rocks the whole house @ 40 % vol.
I see a lot of difference between them from the website:
SW 450:
AMPLIFIER: Class D
AMPLIFIER POWER: FTC Rated Power: 200 watts continuous @ 1% THD, Dynamic Power: 450 watts
BUILT FROM: 2009
DEPTH: 19.5 (49.5cm)
DRIVE COMPONENTS: 10" (25.4cm) high excursion, fiber-composite cone, down-firing woofer
ENCLOSURE TYPE: Bass-reflex via rear-firing port
EXPORT VOLTAGE: 220 VAC 50/60Hz
FEATURES: Volume, Lowpass, Phase, Auto Power
FINISHES: Black vinyl
FREQUENCY RESPONSE: 28-120Hz +/-3dB
HEIGHT: 17 (43.2cm)
INPUTS: L/R line-level RCA jacks, L/R high level speaker binding posts
MAXIMUM ACOUSTIC OUTPUT: 115dB @ 30Hz 1/8 space, 1m
OUTPUTS: N/A
PHASE: Switchable 0-180 degrees
VOLTAGE: 110/120 VAC 60Hz
WEIGHT: 35.5 lbs. (16.1kg)
WIDTH: 14 (35.6cm)
SW 110:
AMPLIFIER: BASH Digital Hybrid
AMPLIFIER POWER: FTC Rated Power: 200 watts continuous @ <2% THD / Dynamic Power*: 450 watts
BUILT FROM: 2010
DEPTH: 17" (43.2cm)
DRIVE COMPONENTS: 10" (25.4cm) Active non-resonant Woven Fiberglass driver
ENCLOSURE TYPE: Bass-reflex via front-firing slot port
EXPORT VOLTAGE: NA, EU, CCC
FINISHES: Black pica
FREQUENCY RESPONSE: 28Hz-120Hz 3dB
HEIGHT: 14" (35.6cm)
INPUTS: L/R Line-level RCA jacks, L/R High-level speaker binding posts, WA port
MAX ACOUSTIC OUTPUT: 113dB @ 30Hz
OUTPUTS: None
SENSITIVITY: 104dB @ 40Hz
VOLTAGE: 100-120V / 220-240V~50/60Hz 2A (Auto-voltage switching) with 1 Watt standby
WEIGHT: 35lbs (15.9kg)
WIDTH: 12.5" (31.8cm)
The 110 has thd @ 2%, i really dont know what it means in real world, but just trying to compare, also the dimensions and the driver of 110 are different. Sw 450 has better db levels 115. Check if there is any price difference, go for the one which is costlier, which may be better.