How traffic is directed in MPLS network? Via ldp LSPs or via RSVP LSPs

Question

My question is basicly to understand how traffic is treated.
Lets assume our topology is :
A-----------------------------B------------------------------------C--------------------------------------------D
1-) if we just enable MPLS under all interfaces, LDP labels are exchanged with each peer. At that moment   RIB, LIB, FIB and LFIB are created on all routers. So LDP LSPs are created dynamicly. but  If i ping "loopback D"  from router A, there will be IP routing or LABEL switching.  will routing make routing by looking IP address at each hop or labels will be swapped at each hop ?
2-) If we enable MPLS traffic engineering capability and create a tunnel interface between router A and router D, vice versa. At that moment, Router A will have :
-simple IGP reachability to Router D,
-Dynamic LDP LSP  and
-RSVP tunnel.
what about now, Which one of the paths above  my traffic will follow ? do I have to direct my traffic to tunnel interface signaled via RSVP. Is there any precedence for choosing the path that traffic will be addressed ?

Answer 1

for second secenario, i have found that I have to write
"tunnel mpls traffic-eng autoroute announce " other wise traffic will always follow LDP signaled paths. In order to get all traffic inside "tunnel" we should execute that command.  once you write that command you see that ;
Before executing command;
R1#sh ip route
O       3.3.3.3 [110/129] via 3.3.3.3, 00:07:08, serial0/0
R1#show mpls forwarding-table
18     18          3.3.3.3/32        0          Se0/0      point2point
After executing command;
R1#sh ip route
O       3.3.3.3 [110/129] via 3.3.3.3, 00:07:08, Tunnel0
R1#show mpls forwarding-table
18     Pop tag [T] 3.3.3.3/32        0          Tu0        point2point 
Hope you see my point, router doesnt decide to use RSVP signaled LSP itself, we shoud trig router to use RSVP signalled LSP.