Cl was firstly used by Whorf in 1941 Difference between comparative and contrastive linguistics

CL was firstly used by Whorf in 1941
Difference between comparative and contrastive linguistics
Comparative linguistics makes a synchronic and diachronic comparison between two languages which are "genetically" similar; ... Contrastive linguistics contrasts the structures of two languages in order to pick all the relevant differences.
Object of CL.
The object of contrasting is two or more languages, more specifically, items of two or more languages that contrastivists can perceive and deduce to communicate
Subject
The goal of contrastive analysis is to predict linguis- tic difficulties experienced during the acquisition of a second language; as formulated by Lado (1957), it suggests that difficulties in acquiring a new (second) language are derived from the differences between the new language and the native (first) language.
The tasks of CL
CL compares mother tongue and foreign language.
Theoretical and practical.
Theoretical are to establish differences and similarities between compared languages, to define tendencies in both languages, to define interlanguage equivalents, to explain the reasons of differences and similarities .
Practical
To define whether differences and similarities are relevant each other methodically or not
To recommend teachers whether It is useful or not using CL.

Methods of CL.
Comparative,
Componential method -show semantic differences
Distributional method- show environments in which this unit occurs
Statistic method show the usage of elements in speech

Types
Contrastive Phonology, Contrastive Lexicology, Contrastive Grammar, Contrastive Stylistics

Comparative typology
Comparative typology is a branch of linguistics comparing languages in order. to establish their similarities and differences. Its object is not singular and. individual cases of similarity and difference but those which are common. large groups of language elements
Comparative typology classifies languages according to their structure.
For example, English analytical, Turkish or Uzbek agglutinative language