‘Hybrid’ is a cool word for an IK which combines a rigid high-pressure dropstitch floor (usually removable; ‘RF’), and conventional round-tubed sides for stability, and so might be considered the best of both worlds.
Paddlers are intrigued by Full Dropstitch IKs like Shipwreck’s Arrowstream, but until hull forms evolve to become more than just a ‘pointed coffin’ box, a hybrid or dropstitch floor IK can be more stable without relying on excessive width which kills performance, especially in shorter boats.
A hybrid IK may also work better than an FDS on windy lakes or the sea. Of course, if you only ever intend to paddle flatwater on calm days, none of this really matters.

According to the graphics of the French Gumotex importer (left; they’re biased, of course!), boxy FDSs can get unstable in choppy waters. Thigh straps would help control the rolling, and I also think a wide, flat, barge-like floor doesn’t help. Some hybrids get round this by having relatively narrow floors with side tubes set high up and which act more like stability pontoons or outriggers. The graphic also suggests that tall, flat FDS sides are more affected by waves and wind, though that’s the case with all IKs.

Below is a table listing a few popular hybrid IKs. Note that in nearly all instances the measurements are what the manufacture claims. I’ve found that many under-report weights, exaggerate payloads and other features, or the specs don’t match other outlets selling exactly the same boat.
It’s a handy place to start, but how an IK actually performs adds up more than just length, width and weight. Consider whether it’s:

• Shell & Bladder (S&B) or Tubeless (TL)
• Is the floor removable? (RF)
• The pressure in the sidetubes and DS floor
• Payload rating
• How easy to convert between solo and tandem seating
• Does it have Pressure Release Valves? (Few do)
• The packed bulk of the boat
• What you get in the package (pump, bag, repair kit, etc)
• And of course availability, price and warranty

	Weight	Length	Width
Advanced Elements StraitEdge2 Pro	41 lbs / 18.6kg	13′ / 3.9m	36″ / 91cm	S&B, RF
Aquaglide Chelan 155	42 lbs / 19kg	15.08 / 4.61m	34″ / 86.3cm	TL, RF
Aqua Marina Steam 412	35 lbs / 16kg	13.4′ / 4.1m	31.5″ / 80cm	TL, RF
Decathlon Itiwit X100 3-seater	39.7 lbs / 18kg	13.4′ / 4.1m	40″ / 102cm	TL, RF
Gumotex Thaya	39 lbs / 17.7kg	13.4′ / 4.1m	35″ / 89cm	TL
Gumotex Rush 2	37.4 lbs / 17kg	13.8′ / 4.2m	32″ / 81cm	TL
Kokopelli Moki II	47.4 lbs / 21.5kg	14′.1 / 4.3m	39″ / 99cm	S&B, RF
NRS Paragon XL	48.5 lbs / 22kg	13.5′ / 4.1m	33.5″ / 90cm	TL, RF
Sea Eagle Explorer 420X	44 lbs / 20kg	14.1′ / 4.3m	39″ / 1 metre	TL, RF
Sea Eagle FastTrack 465	44 lbs / 20kg	15.25′ / 4.65m	36″ / 91cm	TL, RF
Verano Cayman Duo	34.6 lbs / 15.8g	12.6′ / 3.85m	33.5″ / 85cm	TL, RF
Zelgear Spark 450	50.7 lbs / 23kg	14.7′ / 4.5m	32.7 / 83cm	TL, RF