Both are using the same Qualcomm MSM7500 CPU/Chipset and BT chip is TI BRF6300 (
http://forum.ppcgeeks.com/showthread.php?t=7991). Also there are references to BRF6300 in TIInit_4_2_38.bts - file in Titan 2.16 and Touch/Vogue firmware. BTW TIInit_4_2_38.bts is not present in Altell or old 2.09 Titan ROMs- just in Touch and new Titan.
There are few other files like BT_FIR_Param.txt, BT_Init_Script_TI_*.txt, BT_Name_INFO.txt etc. that looks very interesting.
I was able to port all of SYS and most of OEM from Touch to Titan successfully (some of OEMDrivers are not compatible), but not BTHCI.dll... Still have hope
