That sounds a bit disappointing. Wish I were in Japan now to compare the different models. . .
Based on your comments a few items stood out from a quick glance at the 2017 catalogue:
-1- Sharp claims improved touch screen response for the
(newer
) SH4
> The panel specs look the same. I don't know if this means the hardware/firmware/software was tweaked or it is just nonsense marketing speak
> There are Amazon reviews complaining of laggy touch screen response on the SH4
> It seems SH4 word search is a bit streamlined, unrelated to actual touch screen performance
-2- The SH4 has a 40% longer battery life
> Bigger battery and/or firmware tweaks?
-3- The SH4 has bigger keys on the physical keyboard
>There are Amazon reviews complaining of medoicre SH4 keyboard feel and laggy response.
-4- The frame may feel and be creeky. But both the SH3 & SH4 have alu LCD frames, bathtubs, bottom frames. Sharp highlights "POWER BODY" test results on p.1 of the catalogue for the SH4
(I suppose the SH3 has the same frame
). Google translate:
Shock resistant
Robust structure with aluminum alloy LCD frame + bathtub structure + bottom frame.
Strongly protects the LCD. Protects from drops, pressure, and vibrations.
? Verified through in-house testing. We do not guarantee that the product will not be damaged or damaged or malfunction.
¦Drop test: Natural drop from a height of 75 cm to the floor
(P tile
) on 6 sides and 4 corners of a closed product
¦Pressure test: f12
(approximately 1.1cm2
)
) Apply a load of 30kgf within the range of
¦Vibration test: Fix the closed product in a vibration tester and apply it in XYZ directions for 1 hour each
(total 3 hours
) at a total amplitude of 2 mm and 1000 cpm.
https://web.archive.org/web/20171018164755/http://www.sharp.co.jp/catalogdownload/btoc/pc/edictionary/SHARP-edictionary.pdf
I couldn't find the 2016 catalogue.