The Don Young windows are showing better std features and other features that are options on Simonton /Prism 5500 windows and lower U-Values also :Don Young :
Sunshield™ DOUBLE HUNG SYSTEM
Guardian climaguard 55/27 or 63/31 energy star triple layer low e glass, equiv or better than 366
other guardian glass available for different climates
3/4 inch dura lite spacer lower u value than intercept spacer
opt: Cardinal XL stainless steel .750 dual groove spacer, simlilar to superspacer
stainless screw fasteners
lower u values 21 to 23 without grids full view
meeting rail reinforcement std/ opt on simonton 5500
adobe color simular to driftwood
stainless coil lift mechanism
Better price point and built in Dallas and better limited lifetime warranty
Simonton 5500 has similar features but options push the price up there beyond standard "young" features.
55/267 guardian glass is comparable to 366 go to the guardian website and review coating specs,for you climate
Have been looking this subject for a long time and some installers swear by simonton or Prism,Kensington is now serious materials but no local support for their products here in Austin Tx now.
The san antonio DYC sales office supports the austin tx area ,Walt is a good guy
Look up some of the branded IE: Glass, spacers, product links for more detailed info on window components there is a lot to read.
High performance Cardinal spacers with the best IGU in the business...
Standard 3/4" spacers are adequete u values for central texas areas.
Option, Failure is not an option! That is why Don Young Windows options Cardinal XL Edge™ in all insulated glass units (IGU). With the lowest failure rate in the industry, XL Edge™ is a warm edge, stainless steel spacer featuring air tight bent corners and dual seal construction. The insulating capability of XL Edge™ improves a windows U-factor, making it more energy efficient allowing more options & configurations in Don Young Window offerings.