I am a Process Electrician for a water utility and all of my work is based around 3 phase motors,relays,contactors softstarts, plc's, scada control etc and I really enjoy my job, its always something different. Since my apprenticeship I have also multi skilled to Instrument control.
Its well paid and operates an every one week in six standby rosta for critical breakdown and emergencies.
I would recommend to any body to get into that line of work, every year I average 35-40k a year and have a stakeholder final salary pension. Its Probably not the same amount of money as a good house basher spark would get but then I don't mind less money for job security.
I recon you cant go wrong with either trade, just go with the one you have the most aptitude for