Which is better GPON or EPON?

GPON (Gigabit Passive Optical Network) is based on the TU-TG.984.x standard for the new  generations of broadband passive optical access. Compared with the other  PON standards, GPON provides the unprecedented high bandwidth downlink  rate of up to 2.5 Gbit/s, the asymmetric features better adapt to the  broadband data services market. It provides the QoS full business  protection, at the same time carries ATM cells and (or) GEM frame, the  good service level, the ability to support QoS assurance and service  access. Carrying GEM frame, TDM traffic can be mapped to the GEM frame,  8kHz using a standard frame able to support TDM services. As a  carrier-grade technology standards, GPON also provides access network  level protection mechanism and full OAM functions. GPON is widely  deployed in FTTH networks. It can develop into two directions which is  10 GPON and WDM-PON.EPON (Ethernet Passive Optical Network) is the rival activity to GPON which uses Ethernet  packets instead of ATM cells. GEPON uses 1 gigabit per second upstream  and downstream rates. It is a fast Ethernet over PONs which are point to  multipoint to the premises (FTTP) or FTTH architecture in which single  optical fiber is used to serve multiple premises or users. EPON is an  emerging broadband access technologies, through a single fiber-optic  access systems, to access the data, voice and video service, and it has a  good economy.

While knowing all the differences between GPON(ITU-T statnderd) and EPON(IEEE standered), it is still unclear which technology is superiour as a whole but my vote goes to EPON.

EPON is cost effective with good economy.

EPON is most secure as uses encryption for up and down streams where as GPON uses only down stream encryption.

EPON needs as single management system where as GPON requires three for three L-2 protocols. Here EPON is cheaper.

Number of ONUs are limited in GPON(128) but in EPON, it is unlimited and depends upon LD power(amplitude etc)...

and so on...

EPON and GPON are popular versions of passive optical networks (PONs). These short-haul networks of fiber-optical cable are used for Internet access, voice over Internet protocol (VoIP), and digital TV delivery in metropolitan areas. Other uses include backhaul connections for cellular basestations, Wi-Fi hotspots, and even distributed antenna systems (DAS). The primary differences between them lie in the protocols used for downstream and upstream communications.

If you are using Ethernet then EPON is best

GPON is better than EPON because it support higher bit rates

Gpon is better then epon because of the cost per subscriber .

You can check this link for more details:

What’s The Difference Between EPON And GPON Optical Fiber Networks?

GPON is the better because its cost is less then the EPON, EPON higher cost over 40Mbps per subscriber.