IMO the decisive factor is the profile in the SYS.txt
Spoiler: profile vers.1

[tmc-http]
enabled=1
start=1
;profile_name="nng-igo-tmc-igoworld"
;profile_name="nng-igo-tmc-iphone"
profile_name="nng-igo-tmc-jci"

servers.size=3
servers[0].url="http://zippy.naviextras.com/services/tmclite/data/nng-igo-tmc-iphone/0/"
servers[1].url="http://zippy.naviextras.com/services/tmclite/data/nng-igo-tmc-russia/0/"
servers[2].url="http://tmchttp0.naviextras.com/nng-igo-tmc-primo/0/"

Spoiler: vers.2

[tmc-http]
enabled=1
profile_name="nng-igo-tmc-iphone"
;profile_name="nng-igo-tmc-jci"
profile_version=2
udp.enabled=0
start=1
servers.size=3
servers[0].url="http://zippy.naviextras.com/services/tmclite/data/nng-igo-tmc-iphone/0/"
servers[1].url="http://zippy.naviextras.com/services/tmclite/data/nng-igo-tmc-russia/0/"
servers[2].url="http://tmchttp0.naviextras.com/nng-igo-tmc-primo/0/"