Sturer Emil

[Rosollia]

Heuschrecke 10
Waffenträger (Weapon Carrier)

http://www.achtungpanzer.com/wafft.htm#heu



Sd.Kfz.165/1

"based on modified Panzerkampfwagen IV's chassis (Sd.Kfz.161). Modified chassis consisted of three-station bogies per side and larger road wheels."
http://www.achtungpanzer.com/wafft.htm#sd165



10.5cm K18 auf Panzer Selbstfahrlafette IVa
"Dickermax"

http://www.achtungpanzer.com/sel105.htm#pzjag



12.8cm Selbstfahrlafette L/61
(Panzerselbstfahrlafette V)
"Sturer Emil / Stubborn Emil"

http://www.achtungpanzer.com/heu.htm#128



So these are all different vehicles. Although very similar.