Len, I checked the manufacturer sites Alohi & T2 strings are "monofilament" (not nylon, maybe PVDF)
Seems only the g string is a different diameter. The larger diameter used in Alohi g string will make them sound a little warmer.
D'addario's website:
"D'Addario EJ87T sets are designed for use with tenor ukuleles utilizing our bright sounding titanium material. This set is optimized for standard GCEA tuning.
D'Addario Titanium Ukulele strings are crafted from a dense monofilament material that has an attractive, translucent purple hue and a polished, smooth feel similar to nylon. This unique material is particularly beneficial to Ukulele’s due to its slightly brighter tone and increased projection, resulting in more volume, clarity and dynamics.
Optimized for Tenor Ukuleles tuned to standard GCEA tuning
Titanium monofilament material for brightness and projection
Preferred for their modern, projecting tone
String Gauges: Titanium .029, .033, .041, .029
Made in the U.S.A. for the highest quality and performance"
From the Ko'olau site: Alohi info
Tenor 4-String Plain:
4th G – .032 Plain Monofilament
3rd C – .041 Plain Monofilament
2nd E – .033 Plain Monofilament
1st A – .029 Plain Monofilament
From Elderly:
'ALOHI SERIES - Four strings, all strings plain. Made of a dense, hard monofilament material instead of nylon. Tone is bright and projection is strong."