LPCB encompasses LPS1014, which the installed, commissioning and servicing company would obtain.
Unlike BAFE approval scheme SP203, which is modular... i.e. a fire alarm company could gain SP203, in just installation or just commissioning or just servicing etc, LPS1014 is unlike this and therefore you must prove competenance in all these areas.
A fire alarm company may claim to have the BAFE SP203 certificate, but one should then as them which modules this covers.
Generally I find Government projects will require a company certified to LPS1014, although more and mroe 'major' organisations are asking for it, i.e. banking chains, and also insurance companies are increasingly requesting the fire detection system is installed to LPS1014.
Incidentelly, ince a new system is installed to LPS1014 and certified to this it must then be maintained by an LPS1014 company to validate the certificate.